Its all about your use :daily driver, trail rig, show car. Mine's just a daily driver and I don't look into the mileage too much, but when your credit card shows up at the end of the month with $200 in gas alone...you may want to have a defibrilator near, I call that an "oh sh*t" moment. Like everyone else is saying- its all about your knowledge around engines that can kick up your mileage...all that tuning and such
I would kiss the ground for a $200 gas bill ours has been closer to $700 per month and my wife drives a hybrid